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  1. Kudu
  2. KUDU-1897

GSSAPI negotiation single-threaded and very slow under concurrency

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: 1.3.0
    • Fix Version/s: 1.3.0
    • Component/s: rpc, security
    • Labels:
      None
    • Target Version/s:

      Description

      I'm running an Impala workload with ~10 concurrent clients submitting queries that take a few seconds each on a 9 node cluster. The master is pegging on core in negotiation, and has a bunch of other negotiation threads blocked on a mutex within SASL.

      Each negotiation is taking 2-3 seconds due to waiting on this lock.

      This severely restricts connection throughput, and probably needs to be addressed for 1.3.

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        1. rcache.png
          17 kB
          Todd Lipcon

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              • Assignee:
                danburkert Dan Burkert
                Reporter:
                tlipcon Todd Lipcon
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                • Created:
                  Updated:
                  Resolved: